Debian DSA-3495-1 : xymon - security update - Nessus

Critical Plugin ID: 89046

This page contains detailed information about the Debian DSA-3495-1 : xymon - security update Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 89046
Name: Debian DSA-3495-1 : xymon - security update
Filename: debian_DSA-3495.nasl
Vulnerability Published: 2016-04-13
This Plugin Published: 2016-03-01
Last Modification Time: 2021-01-11
Plugin Version: 2.7
Plugin Type: local
Plugin Family: Debian Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/Debian/dpkg-l, Host/Debian/release, Host/local_checks_enabled

Vulnerability Information

Severity: Critical
Vulnerability Published: 2016-04-13
Patch Published: 2016-02-29
CVE [?]: CVE-2016-2054, CVE-2016-2055, CVE-2016-2056, CVE-2016-2057, CVE-2016-2058
CPE [?]: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:xymon

Synopsis

The remote Debian host is missing a security-related update.

Description

Markus Krell discovered that xymon, a network- and applications-monitoring system, was vulnerable to the following security issues :

- CVE-2016-2054 The incorrect handling of user-supplied input in the 'config' command can trigger a stack-based buffer overflow, resulting in denial of service (via application crash) or remote code execution.

- CVE-2016-2055 The incorrect handling of user-supplied input in the 'config' command can lead to an information leak by serving sensitive configuration files to a remote user.

- CVE-2016-2056 The commands handling password management do not properly validate user-supplied input, and are thus vulnerable to shell command injection by a remote user.

- CVE-2016-2057 Incorrect permissions on an internal queuing system allow a user with a local account on the xymon master server to bypass all network-based access control lists, and thus inject messages directly into xymon.

- CVE-2016-2058 Incorrect escaping of user-supplied input in status webpages can be used to trigger reflected cross-site scripting attacks.

Solution

Upgrade the xymon packages.

For the stable distribution (jessie), these problems have been fixed in version 4.3.17-6+deb8u1.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Debian DSA-3495-1 : xymon - security update vulnerability:

Metasploit: exploit/unix/webapp/xymon_useradm_cmd_exec
[Xymon useradm Command Execution]
Metasploit: auxiliary/gather/xymon_info
[Xymon Daemon Gather Information]
Exploit-DB: exploits/multiple/remote/47114.rb
[EDB-47114: Xymon 4.3.25 - useradm Command Execution (Metasploit)]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.5 (High)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.8 (Critical)

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3495. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(89046);
  script_version("2.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2016-2054", "CVE-2016-2055", "CVE-2016-2056", "CVE-2016-2057", "CVE-2016-2058");
  script_xref(name:"DSA", value:"3495");

  script_name(english:"Debian DSA-3495-1 : xymon - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Markus Krell discovered that xymon, a network- and
applications-monitoring system, was vulnerable to the following
security issues :

  - CVE-2016-2054
    The incorrect handling of user-supplied input in the
    'config' command can trigger a stack-based buffer
    overflow, resulting in denial of service (via
    application crash) or remote code execution.

  - CVE-2016-2055
    The incorrect handling of user-supplied input in the
    'config' command can lead to an information leak by
    serving sensitive configuration files to a remote user.

  - CVE-2016-2056
    The commands handling password management do not
    properly validate user-supplied input, and are thus
    vulnerable to shell command injection by a remote user.

  - CVE-2016-2057
    Incorrect permissions on an internal queuing system
    allow a user with a local account on the xymon master
    server to bypass all network-based access control lists,
    and thus inject messages directly into xymon.

  - CVE-2016-2058
    Incorrect escaping of user-supplied input in status
    webpages can be used to trigger reflected cross-site
    scripting attacks."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-2054"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-2055"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-2056"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-2057"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-2058"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/xymon"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2016/dsa-3495"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the xymon packages.

For the stable distribution (jessie), these problems have been fixed
in version 4.3.17-6+deb8u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Xymon useradm Command Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xymon");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/02/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/03/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"xymon", reference:"4.3.17-6+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xymon-client", reference:"4.3.17-6+deb8u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/debian_DSA-3495.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\debian_DSA-3495.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/debian_DSA-3495.nasl

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How to Run

Here is how to run the Debian DSA-3495-1 : xymon - security update as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Debian Local Security Checks plugin family.
On the right side table select Debian DSA-3495-1 : xymon - security update plugin ID 89046.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl debian_DSA-3495.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a debian_DSA-3495.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - debian_DSA-3495.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state debian_DSA-3495.nasl -t <IP/HOST>

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References

DSA | Debian Security Advisory:

3495

See also:

Similar and related Nessus plugins:

91324 - Debian DLA-488-1 : xymon security update
88666 - FreeBSD : xymon-server -- multiple vulnerabilities (1cecd5e0-c372-11e5-96d6-14dae9d210b8)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file debian_DSA-3495.nasl version 2.7. For more plugins, visit the Nessus Plugin Library.

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Debian DSA-3495-1 : xymon - security update - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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